11698...96889 (80-digits)

This number is a prime.

                                                                  1169889610
1111181609 6196898088 1888890691 6986100111 1116911881 1961600961 1966996889

Just showing those entries submitted by 'Gupta': (Click here to show all)

The concatenation of the first 25 multidigit strobogrammatic numbers is a prime number. [Gupta]